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Au 14, 1934. SNOW 1,970,401

BOILER CLEANER Original Filed New. 19. 1923 2 Sheets-Sheet 1 llll\ulllllll It I "IT-"III" N. L. SNOW BILER CLEANER Aug. 14, 1934.

2 Sheets-Sheet 2 Original Filed Nov. 19, 1923 lwuzhtoz ADI Patented Aug.14, 1934 t me STATES renal 1,970,401 BOILER CLEANER Norman L.'Snow, NewCanaan, Conn; assignor to Diamond Power Specialty Corporation, Detroit,Mich., a corporation of Michigan Renewed October 28, 1932 ApplicationNovember 19, 1923, Serial No. 675,688 l I 5 Claims. 1 (01. 122-392)Theinvention relates to boiler cleaners and refers more particularly tothat type having a rotary blower element adapted to discharge steam orthe like upon the boiler tubes. One of the objects of the invention isthe provision of a rotary blower element which is automatically rotated.Another object is the provision of a rotary blower element havingnozzles through which the steam or the like is discharged upon theboiler tubes and by means of which the blower element is automaticallyrotated. A further object of the invention is the provision of means forinsuring slow rate of rotation of the blower element.

With these as well as other objects in view, the invention resides inthe novel features of construction and combinations and arrangements ofparts as more fully hereinafter set forth.

In the drawings:

Figure 1 is a side elevation of a boiler cleaner embodying my invention;

Figure 2 is a sectional elevation thereof;

Figure 3 is a view similar to Figure 2 but showing a modifiedconstruction;

Figure 4 is an end view of still another modified construction.

1 is the blower element extending through the wall of the furnace andadapted to discharge jets of steam or the like upon the boiler tubesThis blower element is connected to the stationary supply pipe 2 forsupplying the steam or the like by a suitable swivel in the usualmanner.

For automatically rotating the blower element 1 when the steam or thelike is turned on, I have provided the same with the longitudinal seriesof nozzles 3, each having a portion 4 extending radially of the blowerelement and connecting thereinto and a transverse portion 5 at substantially right angles to the portion 4, the arrangement being such that asthe steam or the like passes through the nozzles, the reactive effortwill rotate the blower element in a direction opposite to that taken bythe steam or the like as it is discharged from the nozzles. Thesendzzles also function to discharge the steam or the like upon the boilertubes.

For compelling a slow rotative movement of the blower element, I haveprovided the disk 6 having a toothed or cammed periphery. This peripheryis engaged preferably by rollers 7 upon the parallel upper and lowerarms 8 and 9 of the rod 10 which is guided in the bearings 11 and isconnected at its lower end to the piston 12 slidable within the cylinder13. The position of the rollers '7 is such that when one roller isengageable with the. outer end of a tooth upon the disk, theotherrolleris engageable in the, space betweenthe teeth, whereby the diskcom pelslongitudinal reciprocation of the rod and also the piston. The cylinder13 preferably contains a liquid and has a slightly greater internaldiameter than the diameter of the piston to produce a limited clearancetherebetween.

This dash-pot construction produces a damping secured uponthe blowerelement. Slow rotation of the blower element is assured by means of thedash pot l8 operated by the cammed or toothed disk 19 in the same manneras that of the mechanism disclosed in Figures 1 and 2.

As shown in Figure 4, the dash pct 20 may be applied to the rockingmechanism of a ratchet operated device for rotating the blower element,this rocking mechanism being actuated by suitable means such as a steamoperated piston slidable in the cylinder 21.

For the sake of illustration, the invention has been disclosed as beingincorporated in a boiler cleaner for cleaning parts of a boiler. It willbe apparent, however, that the inventive principles disclosed may beincorporated in devices for cleaning similar types of apparatuses. It isto be therefore understood that the term boiler wherever used throughoutthe specification and claims, is to be construed as meaning a fluidheater or heat transfer apparatus of any character, while the termboiler cleaner is to be construed as meaning a cleaner for any suchapparatus.

What I claim as my invention is:

1. In a boiler cleaner, the combination witha rotary blower element, ofmeans for rotating the same, a cam member operated by said blowerelement, and means operated by said cam member for opposing resistanceto the rotation of said blower element.

2. In a boiler cleaner, the combination with a rotary blower element, ofmeans for rotating the same, a cam operatively connected to said rotaryblower element, and a dash pot operated by said cam for opposing aresistance to the rotation of said blower element.

3. In a boiler cleaner, the combination with a cleaning fluid supplypipe, of a rotatable blower element provided with. a discharge nozzleadapted to discharge cleaning fluid from. said supply pipe toward partsof the boiler to be cleaned, said nozzle being so directed as to utilizethe reactive force of the cleaning fluid being discharged, to impartrotation to said blower element, and means acting in opposition to saidblower element rotating means to dampen the rotation of the blowerelement under the influence of the said blower element rotating means,saidimeans including a cam member and a roller engageable with the saidcam member; 7 1 r v 4. The combination with a rotatable blower elementand means for rotating the said element,

of means for dampening and regulating the speed of rotation of the saidelement, said last mentionedmeans including a cam member rotatablemember and means retarding movement of the said rollers.

6. In a boiler cleaner, a rotatable blower element provided with adischarge nozzle, a member rotatable. with said element, the said memberanotched portion, means for supply- 'ing a cleaning fluid to saidnozzle, the nozzle being soarranged that/the reaction of the cleaningfiuidissuing from the same will impart a rotary movement to the element,and means acti'ngon the notched portion of said member for opposing therotation of said member and. said blower element. v V v s i NORMAN LlSNOW.

